feat: add generate button to empty state panel

When a note has no cached parallel notes, the empty state now shows a
clickable "Generate" button so users can trigger generation directly
without going through the command palette. Closes #2.

Change-Id: I879897168ef77c44e0ab570e9c094fa9af9f66d4

src/i18n.ts

@@ -52,6 +52,7 @@ export const STRINGS: Record<string, Record<string, string>> = {
     noCancelableJob: '当前没有可取消的生成任务',
     cancelRequested: '已请求取消生成',
     cancelRequestedApiInFlight: '已请求取消生成；当前 API 请求无法立即中断，返回后会丢弃结果。',
+    actionGenerate: '生成对照笔记',
     fileMenuGenerate: '生成对照笔记',
     fileMenuRegen: '强制重新生成对照笔记',
     fileMenuClear: '清除对照笔记缓存',
@@ -210,6 +211,7 @@ export const STRINGS: Record<string, Record<string, string>> = {
     cancelRequested: 'Cancel requested',
     cancelRequestedApiInFlight:
       'Cancel requested. The in-flight API request cannot be aborted immediately; its result will be ignored.',
+    actionGenerate: 'Generate parallel notes',
     fileMenuGenerate: 'Generate parallel notes',
     fileMenuRegen: 'Regenerate parallel notes',
     fileMenuClear: 'Clear parallel-note cache',

src/view.ts

@@ -148,6 +148,10 @@ export class ParallelReaderView extends ItemView {
     hint.createEl('h3', { text: file.basename });
     hint.createEl('p', { text: this.plugin.t('emptyNoCache') });
     hint.createEl('code', { text: this.plugin.t('commandGenerate') });
+    addTextButton(hint, null, this.plugin.t('actionGenerate'), () => {
+      if (this.plugin.isGeneratingFile(file)) return;
+      this.plugin.runForFile(file, false);
+    });
   }
 
   render() {

styles.css

@@ -350,6 +350,11 @@
   font-size: 11px;
 }
 
+.parallel-reader-empty .parallel-reader-text-button {
+  display: flex;
+  margin: 12px auto 0;
+}
+
 .parallel-reader-stream-text {
   margin-top: 10px;
   max-height: 200px;